/**
 * Copyright (c) 2012-2016, www.tinygroup.org (luo_guo@icloud.com).
 *
 *  Licensed under the GPL, Version 3.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.gnu.org/licenses/gpl.html
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.tinygroup.template.function;

import org.tinygroup.template.Template;
import org.tinygroup.template.TemplateContext;
import org.tinygroup.template.TemplateException;

public class ToIntFunction extends AbstractTemplateFunction {

    public ToIntFunction() {
        super("toInt,toint");
    }

    public Object execute(Template template, TemplateContext context,
                          Object... parameters) throws TemplateException {

        if (parameters == null || parameters.length < 1 || parameters[0] == null) {
            throw new TemplateException("toInt函数必须输入转换的参数");
        } else {
            if (parameters[0] instanceof Integer) {
                return parameters[0];
            } else if (parameters[0] instanceof String) {
                return Integer.parseInt((String) parameters[0]);
            }
        }
        return null;
    }

}
